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i think the hp gaing are like 10-15 hp you will notice a little bit of a difference in your top end
The gsr's (P72) vtec crossover is at 4500 rpm's, compared to a b16/b18c-r at 5500+. I believe that this is done in order to take advantage of the different air flow charictaristics of the GSR's dual runner design. I'm thinking it may be wise to swap over to another b series ecu (P28), in order to have a higher vtec crossover at the 5500+ rpm range in order to match the single runner design of the skunk2 manifold.
Please tell me if i'm wrong^_^
just installed mine. feels fuckin great good pwer gain on the butt dyno. its a pain in the ass if you follow the instructions they give you. you have to use diff hoses. for this intake though i give a big thumbs up